JPS56149319A - Manufacture of low-soda alumina - Google Patents
Manufacture of low-soda aluminaInfo
- Publication number
- JPS56149319A JPS56149319A JP5195280A JP5195280A JPS56149319A JP S56149319 A JPS56149319 A JP S56149319A JP 5195280 A JP5195280 A JP 5195280A JP 5195280 A JP5195280 A JP 5195280A JP S56149319 A JPS56149319 A JP S56149319A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- low
- substance
- contg
- fluorine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To manufacture alumina with low sodium content suitable for use as an insulating material, etc. at a low calcining temp. by calcining aluminum hydroxide or alumina in the presence of a siliceous substance and a fluorine-contg. substance.
CONSTITUTION: To sodium-contg. aluminum hydroxide or alumina are added a siliceous substance such as silica sand by about 1W20wt% as SiO2 to the amount of alumina on the basis of dry weight and a fluorine-contg. substance such as aluminum fluoride by ≥about 0.02% as F2, and they are mixed. This mixture is calcined usually at ≥1,000°C, and the calcined alumina is passed through a sieve or the like to separate the siliceous substance. By this method sodium can be removed at such a low calcining temp. by the action of fluorine, and alumina with low sodium content is obtd. industrially.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5195280A JPS56149319A (en) | 1980-04-18 | 1980-04-18 | Manufacture of low-soda alumina |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5195280A JPS56149319A (en) | 1980-04-18 | 1980-04-18 | Manufacture of low-soda alumina |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56149319A true JPS56149319A (en) | 1981-11-19 |
JPS6335573B2 JPS6335573B2 (en) | 1988-07-15 |
Family
ID=12901204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5195280A Granted JPS56149319A (en) | 1980-04-18 | 1980-04-18 | Manufacture of low-soda alumina |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56149319A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001002464A (en) * | 1998-11-24 | 2001-01-09 | Ngk Spark Plug Co Ltd | High-voltage-withstanding aluminous sintered compact and its production |
JP2001048637A (en) * | 1999-08-04 | 2001-02-20 | Ngk Spark Plug Co Ltd | Alumina-base sintered body and its production |
JP2003012323A (en) * | 2001-06-26 | 2003-01-15 | Sumitomo Chem Co Ltd | Method for producing low soda alumina |
JP2005263529A (en) * | 2004-03-17 | 2005-09-29 | Sumitomo Chemical Co Ltd | Method for producing activated alumina having low alkali content |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5253907A (en) * | 1975-10-28 | 1977-04-30 | Nikkei Kako Kk | Manufacture of alumina for ceramics |
JPS5416398A (en) * | 1977-07-07 | 1979-02-06 | Showa Denko Kk | Production of low soda alumina |
-
1980
- 1980-04-18 JP JP5195280A patent/JPS56149319A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5253907A (en) * | 1975-10-28 | 1977-04-30 | Nikkei Kako Kk | Manufacture of alumina for ceramics |
JPS5416398A (en) * | 1977-07-07 | 1979-02-06 | Showa Denko Kk | Production of low soda alumina |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001002464A (en) * | 1998-11-24 | 2001-01-09 | Ngk Spark Plug Co Ltd | High-voltage-withstanding aluminous sintered compact and its production |
JP2001048637A (en) * | 1999-08-04 | 2001-02-20 | Ngk Spark Plug Co Ltd | Alumina-base sintered body and its production |
JP2003012323A (en) * | 2001-06-26 | 2003-01-15 | Sumitomo Chem Co Ltd | Method for producing low soda alumina |
JP2005263529A (en) * | 2004-03-17 | 2005-09-29 | Sumitomo Chemical Co Ltd | Method for producing activated alumina having low alkali content |
Also Published As
Publication number | Publication date |
---|---|
JPS6335573B2 (en) | 1988-07-15 |
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